Standard PH1 Screwdriver Bit is a useful and high-quality product that is compatible with a wide range of regular and power tools This screwdriver bit is cast from a sturdy, top-quality material making it a long-lasting tool that is sure to be in your kit for several years This screwdriver bit is PH1 compliant and has an end-to-end length of 49 mm, with a 6.35 mm external hex shank Despite its strong and tough makeup, the bits barely add any extra weight to your tool box as each one weighs just 20 grams